sigfile/dist/bluefile.js

Utilities to reading signal data from files

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/**
 * @license apache-2.0
 * @file bluefile.src
 * Copyright (c) 2012-2020, LGS Innovations Inc., All rights reserved.
 *
 * This file is part of SigFile.
 *
 * Licensed to the LGS Innovations (LGS) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  LGS licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */var A=function(){function t(e,r){if(v(this,t),void 0===r&&(r={}),this.options=Object.assign({ext_header_type:"dict"},r),this.buf=e,null!=this.buf){this.setHeader();var n=this.data_start,i=this.data_start+this.data_size;this.setData(this.buf,n,i,this.littleEndianData)}}var e,r,n;return e=t,(r=[{key:"setHeader",value:function(){var t=new DataView(this.buf);this.version=s(this.buf.slice(0,4)),this.headrep=s(this.buf.slice(4,8)),this.datarep=s(this.buf.slice(8,12));var e="EEEI"===this.headrep;this.littleEndianData="EEEI"===this.datarep,this.ext_start=t.getInt32(24,e),this.ext_size=t.getInt32(28,e),this.type=t.getUint32(48,e),this.class=this.type/1e3,this.format=s(this.buf.slice(52,54)),this.timecode=t.getFloat64(56,e),1===this.class?(this.xstart=t.getFloat64(256,e),this.xdelta=t.getFloat64(264,e),this.xunits=t.getInt32(272,e),this.yunits=t.getInt32(296,e),this.subsize=1):2===this.class&&(this.xstart=t.getFloat64(256,e),this.xdelta=t.getFloat64(264,e),this.xunits=t.getInt32(272,e),this.subsize=t.getInt32(276,e),this.ystart=t.getFloat64(280,e),this.ydelta=t.getFloat64(288,e),this.yunits=t.getInt32(296,e)),this.data_start=t.getFloat64(32,e),this.data_size=t.getFloat64(40,e),this.ext_size&&(this.ext_header=this.unpack_keywords(this.buf,this.ext_size,512*this.ext_start,e))}},{key:"setData",value:function(e,r,n,i){void 0===i&&(i="LE"===t.ARRAY_BUFFER_ENDIANNESS),this.spa=t._SPA[this.format[0]],this.bps=t._BPS[this.format[1]],this.bpa=this.spa*this.bps,1===this.class?this.ape=1:2===this.class&&(this.ape=this.subsize),this.bpe=this.ape*this.bpa;var a="LE"===t.ARRAY_BUFFER_ENDIANNESS,o="BE"===t.ARRAY_BUFFER_ENDIANNESS;if(a&&!i||o&&this.littleEndianData)throw"Not supported ".concat(t.ARRAY_BUFFER_ENDIANNESS," ").concat(i);if(e){if(r&&n){var s=(n-r)/this.bps;this.dview=this.createArray(e,r,s)}else this.dview=this.createArray(e);this.size=this.dview.length/(this.spa*this.ape)}else this.dview=this.createArray(null,null,this.size)}},{key:"unpack_keywords",value:function(e,r,n,i){var a,o,u,l,f,c,h,p,y,d=[],v={},g={},_=0;e=e.slice(n,e.byteLength);var A=new DataView(e);for(e=s(e);_<r;){if(y=_+8,a=A.getUint32(_,i),o=A.getInt16(_+4,i),u=A.getInt8(_+6),l=e.slice(_+7,_+8),p=y+(h=a-o),f=e.slice(p,p+u),"A"===l)c=e.slice(y,y+h);else{if(!t._XM_TO_DATAVIEW[l])throw"Unsupported keyword format ".concat(l," for tag ").concat(f);var w=t._XM_TO_DATAVIEW[l];c="string"==typeof w?A[w](y,i):w(A,y,i)}void 0===v[f]?v[f]=1:(v[f]++,f=""+f+v[f]),g[f]=c,d.push({tag:f,value:c}),_+=a}var m=["dict","json",{},"XMTable","JSON","DICT"],S=this.options.ext_header_type;if("object"===b(S)&&null!==S&&0===Object.keys(S).length&&S.constructor===Object)return g;for(var E in m)if(m[E]===S)return g;return d}},{key:"createArray",value:function(e,r,n){var i,a=t._XM_TO_TYPEDARRAY[this.format[1]];if(void 0===a)throw"unknown format ".concat(this.format[1]);if(void 0===r&&(r=0),void 0===n&&(n=e.length||e.byteLength/t._BPS[this.format[1]]),e)if(Array.isArray(e)&&Array.isArray(e[0]))i=new a(e=[].concat.apply([],e),r,n=e.length*e[0].length);else if(Array.isArray(e)&&ArrayBuffer.isView(e[0])){i=new a(n=e.length*e[0].length);for(var o=0;o<e.length;++o)i.set(e[o],o*e[0].length)}else i=new a(e,r,n);else i=new a(n);return i}}])&&g(e.prototype,r),n&&g(e,n),t}();_(A,"ARRAY_BUFFER_ENDIANNESS",
/**
 * @license apache-2.0
 * @file util.src
 * Copyright (c) 2012-2020, LGS Innovations Inc., All rights reserved.
 *
 * This file is part of SigFile.
 *
 * Licensed to the LGS Innovations (LGS) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  LGS licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
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